Electronic device and cooling fan

Abstract

A cooling fan and an electronic device are provided. The cooling fan comprises a plurality of blades disposed in a circumferential direction of a rotating shaft. The plurality of blades includes a first blade and a second blade. A windward surface of the first blade includes a first alignment part and a first offset part. The first alignment part is aligned with a windward surface of the second blade, and the first offset part and the windward surface of the second blade are arranged in a staggered manner.

What is claimed is: 
     
       1. A cooling fan, comprising:
 a plurality of blades disposed in a circumferential direction of a rotating shaft, the plurality of blades being connected to the rotating shaft through a circumferential side of a central connector and arranged entirely at the circumferential side of the central connector, 
 
       wherein:
 the plurality of blades comprises a first blade and a second blade, wherein:
 a windward surface of the second blade is the same as a windward surface of the first blade, wherein the windward surface is opposite a direction of airflow generated by the cooling fan, the windward surface of the first blade is defined by a width of the first blade in an axial direction of the rotating shaft, and the windward surface of the second blade is defined by a width of the second blade in the axial direction of the rotating shaft; 
 the windward surface of the first blade includes a first alignment part and a first offset part, the windward surface of the second blade includes a second alignment part and a second offset part, the first alignment part is aligned with the second alignment part, the first offset part and the windward surface of the second blade are arranged in a staggered manner, the second offset part and the windward surface of the first blade are arranged in a staggered manner, and in the axial direction of the rotation shaft, the second offset part and the first offset part are disposed at two sides of the first alignment part, respectively. 
 
 
     
     
       2. The cooling fan according to  claim 1 , wherein:
 the first blade and the second blade being alternately arranged in the circumferential direction of the rotating shaft. 
 
     
     
       3. An electronic device, comprising:
 a heat generating component disposed in the electronic device, being configured to perform processing function of the electronic device; and 
 a cooling fan for cooling the heat generating component disposed apart from the heat generating component, wherein the cooling fan comprises a plurality of blades disposed in a circumferential direction of a rotating shaft, the plurality of blades being connected to the rotating shaft through a circumferential side of a central connector and arranged entirely at the circumferential side of the central connector, 
 wherein:
 the plurality of blades comprises a first blade and a second blade, wherein:
 a windward surface of the second blade is the same as a windward surface of the first blade, wherein the windward surface is opposite a direction of airflow generated by the cooling fan, the windward surface of the first blade is defined by a width of the first blade in an axial direction of the rotating shaft, and the windward surface of the second blade is defined by a width of the second blade in the axial direction of the rotation shaft; 
 the windward surface of the first blade includes a first alignment part and a first offset part, the windward surface of the second blade includes a second alignment part and a second offset part, the first alignment part is aligned with the second alignment part, the first offset part and the windward surface of the second blade are arranged in a staggered manner, the second offset part and the windward surface of the first blade are arranged in a staggered manner, and in the axial direction of the rotating shaft, the second offset part and the first offset part are disposed at two sides of the first alignment part, respectively. 
 
 
 
     
     
       4. The electronic device according to  claim 3 , wherein:
 the first blade and the second blade being alternately arranged in the circumferential direction of the rotating shaft.